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ssh jump fail abou banner invalid characters

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Updated sshd journal on both jumphost and jumptarget ---------- Full logs are too long to be pasted. uploaded to gist three files are logs that : Local -> Jumpper -> Debian by ssh -j Local -> Jumpper -> Debian by ssh Debian Local -> Jumpper by ssh jumpper Jumper -> Debian by ssh 10.10.10.3 FYI: During this time, the IP address was re-planned 10.10.1.3 -> 10.10.10.3, and a domain was added in the hosts. These shouldn't have any effect on the problem. ---------- A similar problem is [SSH ProxyJump on macOS Catalina is not working](https://superuser.com/q/1510997) . but the answer doesn't solve my case I'm configuring ssh jump with the following configures:
Host Jumper
	HostName domainName
	User username
	Port 1234

Host Debian
	HostName 10.10.1.3
	User username
	Port 22
	ProxyJump Jumper
The result of ssh Debian -vvv is
...
debug1: kex_exchange_identification: banner line 0: \033(B\033[mSSH-2.0-OpenSSH_9.2p1 Debian-2
kex_exchange_identification: banner line contains invalid characters
...
it shows OpenSSH, so I think the port should be correct ssh Jumper is fine, and manully ssh 10.10.1.3 on jumper is also fine. The local host is a Macos at OpenSSH_9.0p1 and the others are OpenSSH_9.2p2
Asked by Leo (1 rep)
Sep 18, 2023, 02:41 AM
Last activity: Jul 17, 2025, 09:28 AM